a0699ebf77
functions in the LinuxKPI. Add a usage atomic to the task_struct structure to facilitate refcounting the task structure when returned from get_pid_task(). The get_task_struct() and put_task_struct() function is used to manage atomic refcounting. After this change the task_struct should only be freed through put_task_struct(). Obtained from: kmacy @ MFC after: 1 week Sponsored by: Mellanox Technologies
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*-
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* Copyright (c) 2017 Mellanox Technologies, Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_PID_H_
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#define _LINUX_PID_H_
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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enum pid_type {
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PIDTYPE_PID,
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PIDTYPE_PGID,
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PIDTYPE_SID,
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PIDTYPE_MAX
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};
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#define pid_nr(n) (n)
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#define pid_vnr(n) (n)
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#define from_kuid_munged(a, uid) (uid)
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#define pid_task(pid, type) ({ \
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struct task_struct *__ts; \
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CTASSERT((type) == PIDTYPE_PID); \
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__ts = linux_pid_task(pid); \
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__ts; \
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})
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#define get_pid_task(pid, type) ({ \
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struct task_struct *__ts; \
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CTASSERT((type) == PIDTYPE_PID); \
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__ts = linux_get_pid_task(pid); \
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__ts; \
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})
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struct task_struct;
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extern struct task_struct *linux_pid_task(pid_t);
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extern struct task_struct *linux_get_pid_task(pid_t);
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#endif /* _LINUX_PID_H_ */
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